PHP 5 introduced the concept of constructor. Constructors are magic method which call automatically when object is created. But when you define the constructor method both in Child and Parent class, it will not call until you explicitly reference it. So How to call parent class constructor in child class.
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Write a program to delete a linked list. Given a linked list, we have to write a code to delete a linked list.
To delete a complete linked list, traverse all the nodes of a linked list and delete one by one.
Print Middle Element of a Linked List
To delete a node one by one maintain two pointers. The first pointer points to head and the second pointer keeps the reference to next node. So when a node is free, you can assign the reference of next node using the second pointer.